Sergey M Kuzmin

• PhD
• Russian Academy of Sciences

A comparative study of the aggregation behavior of tetra-tert-butylphthalocyanine aluminum(III) in micellar aqueous solutions of different surfactants was carried out. The maximum degree of tetra-tert-butylphthalocyanine aluminum(III) monomerization was found for the Cremophor EL micellar solution. In the range of the surfactant concentrations of 0...

In this work the bimetallic composites formation via electrochemical co-deposition of Fe(III)Cl-5,10,15,20-tetrakis(4-aminophenyl)porphyrin and Mn(III)Cl-5,10,15,20-tetrakis(4- aminophenyl)porphyrin has been studied. The composites were obtained by superoxide-assisted electrochemical deposition from mixed DMSO solutions with equal concentrations of...

Due to the increasing global demand for sustainable energy sources, fuel cells are being considered as a green alternative to conventional power generation methods. Proton Exchange Membrane Fuel Cells (PEMFCs) are particularly promising energy sources due to their high energy efficiency and low environmental impact. However, there is an urgent need...

Nanoarchitectures with promising properties have now been formed from many important biomolecules. However, the preparation of nanoparticles of vitamin B12 and its derivatives remains an ongoing research challenge. This paper describes the formation of supermolecular nanoentities (SMEs) of vitamin B12 derivatives, unique nanoparticles with strong n...

Polyporphyrin films based on 5,10,15,20-tetrakis(p-aminophenyl)porphyrin (Porph-C6H4-NH2) were obtained from DMSO solution by the electrochemical method under potentiodynamic conditions. It was demonstrated that dissolved oxygen significantly influences the electrochemical deposition process. The potential ranges corresponding to the formation of t...

Hydroxy- and aminophenylporphyrin polymer films have been obtained by a superoxide-assisted electrochemical deposition method. This paper demonstrates the effect of the porphyrin structure on the film morphology and electrocatalytic properties of the prepared materials. A catalytic activity series of the synthesized metal-free electropolymers has b...

Three bismuth silicate-based photocatalysts (composites of Bi2SiO5 and Bi12SiO20) prepared via the hydro-/solvothermal approach were studied using electrochemical methods. The characteristic parameters of semiconductors, such as flat band potential, donor density, and mobility of their charge carriers, were obtained and compared with the materials’...

In this study, we apply the superoxide-assisted electrochemical deposition method to obtain polyporphyrin films based on 2Н-5,10,15,20-tetrakis(3-aminophenyl)porphyrin from dimethylsulfoxide solutions. It is shown that changes in the potential scan rate affect the film formation efficiency and surface morphology of electrodeposited polyporphyrin fi...

Polymer films based on 2H-5,10,15,20-tetrakis(3-aminophenyl)porphyrin have been successfully prepared by superoxide-assisted electrochemical deposition method from dimethyl sulfoxide solutions. Investigation of the deposition process and obtained films demonstrates typical for superoxide-assisted method mechanism of polymer formation, which leads t...

This work presents the results of obtaining polyporphyrin Zn-tetrakis(4-hydroxyphenyl)porphyrin films by superoxide-assisted electrochemical deposition. The study determines the regions of potentials where the polyporphyrin film on the working electrode is formed. It also proposes mechanisms of formation of radical porphyrin species in these region...

Carbon-based materials are widespread and promising in areas such as electrochemical and electrocatalytic power generation and can be excellent choices for use as electrode substrates. To increase the efficiency of using carbonaceous materials, the surface of the electrodes is modified with metal complexes of phthalocyanines and porphyrins with ele...

Carbon-based materials are common and quite promising for such industrial applications as power generation using electrochemical and electrocatalytic processes and can be successfully used as electrode substrates. The effectiveness of carbonaceous materials can be improved by modifying the electrode surface with phthalocyanine and porphyrin metal c...

Having a wide range of applications, bismuth silicate-based materials (BSO) attract attention of numerous researchers. Typically, they are synthesized either from active chemicals or through high-energy impact on their precursors. The present work is the first report on BSO-based nanomaterials prepared via laser processing in liquid phase in which...

Polymer films based on two different hydroxyphenyl porphyrins were obtained by the superoxide-assisted electrochemical method. Using atomic-force microscopy, we demonstrated the uniformity and low roughness of the films with a thickness of up to ∼200 nm. The spectral data obtained in this work confirm that the porphyrin moieties are preserved and c...

Proton-conducting membranes based on polybenzimidazole and N-butylimidazolium triflate ionic liquid with different molar ratios of the components were prepared by solution casting. Phase transitions as well as thermal and electrochemical stability of the membranes were studied. The temperature dependences of the membrane conductivity were obtained....

Superoxide-initiated anion-radical electrodeposition from solutions in DMSO was used to obtain smooth compact films of poly-5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin having a photovoltaic response.

In this work, we have studied electrochemical formation of poly-2H-5,10,15,20-tetrakis (meta-hydroxyphenyl)porphyrin (H2T (3-OHPh)P) and poly-2H-5,10,15,20-tetrakis (para-hydroxyphenyl)porphyrin (H2T (4-OHPh)P) films from solutions in dimethyl sulfoxide in potentiostatic and potentiodynamic conditions. We have found the potential regions and determ...

The process of deposition of 5,10,15,20-tetrakis(4-aminophenyl)porphyrin (H2T(4-NH2Ph)P) electopolymer films induced by superoxide anion radical in dimethyl sulfoxide (DMSO) has been studied. By the methods of electrode impedance spectroscopy and atomic-force microscopy it has, for the first time, been proved that it is possible to form a poly-H2T(...

The process of 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin electropolymerization has been studied by the quartz crystal microbalance method in different electrodeposition conditions. The films were deposited in two modes: in potentiostatic conditions (at the potential of [Formula: see text]2 V) and in potentiodynamic conditions (CV with the poten...

The method of superoxide-assisted electrochemical deposition was employed for the formation of film materials based on hydroxyphenylporphyrins and their metal complexes. The C–O–C bridges were the major moieties for bonding porphyrins inside the electropolymer. The obtained polyporphyrin films demonstrated a hole type of conductivity, which mak...

Electrochemical behavior and superoxide-assisted electrochemical deposition of Mn(III)chloride 5,10,15,20-tetrakis(meta-aminophenyl)porphine (MnClT(m-NH2Ph)P) and Mn(III)chloride 5,10,15,20-tetrakis(para-aminophenyl)porphine (MnClT(p-NH2Ph)P) in DMSO solutions on electrodes of various types have been investigated. It is shown that a surface film is...

This review is devoted to porphyrin-based film materials. Various technological and scientific applications of ones are close to surface and interface related phenomena. In the part I of review the following topics are discussed the recent progress in field of submonolayers, monolayers and multilayers films on the vapor-solid interfaces, including...

The effects of surfactants on the electrolytic deposition of tin–nickel alloys from oxalate–ammonium electrolytes were determined. The adsorption of the nonionic surfactant at the interface decreases the rate of charge transfer across the interface. As a result, the electrochemical stage of the electroreduction of metals slows down, and the alloy i...

The electrochemical deposition of polyporphyrin films was activated by the superoxide radical anion generated in solution upon electrochemical reduction of dissolved oxygen.

Fe(III)-complexes of amino-substituted tetraphenylporphyrins obtained from solutions in organic solvents: dichloromethane, ethanol, and dimethyl sulfoxide have been electropolymerized. The solvents’ effects on deposition and surface morphology of the obtained polyporphyrin film have been determined. It is only possible to obtain a polyporphyrin fil...

We present electrocatalytic films of ClFe(III)5,10,15,20-tetrakis(p-aminophenyl) porphyrin (FeClT(p-NH2Ph)P) formed by new electrochemical deposition method using oxygen saturated dimethyl sulfoxide solutions (DMSO) as a medium. Superoxide promotes the poly-porphyrin film formation on the working electrode surface due to it high affinity both to hy...

The novel electrochemical approach based on coulometric response of electro-generated superoxide (O2•-) was used to determine scavenging properties of 2H-5,10,15,20-tetrakis (4-hydroxyphenyl)porphyrin (H2T(4-OHPh)P); 2H-5,10,15,20-tetrakis[4-(2-hydroxyethyloxy)phenyl]porphyrin (H2T(4-OH(CH2)2OPh)P); 2H-5,10,15,20-tetrakis[4-(4-hydroxybutyloxy)pheny...

The films formation via activated by oxygen electrochemical oxidation of hydroxy-phenylporphyrin and its zinc complex in dimethyl sulfoxide media was demonstrated. The differ-ent kinetics of deposition and morphologies of the films were observed. During the film deposition the working electrode surface was passivated in case of porphyrin-ligand, a...

The influence of pulse recurrence frequency on the accuracy of electrochemical machining of steel 08KP, nickel H1, and copper M1 is shown. Variation of the pulse recurrence frequency leads to similar changes in the tool electrode copying accuracy. This allows us to extend the scope of application of the pulsed mode of electrochemical machining. The...

The novel electrochemical approach based on coulometric response of electro-generated superoxide is applied to the radical scavenging activity determination of hydroxy substituted tetraphenylporphyrins. The excellent linearity of the coulometric response of superoxide ion vs. porphyrins concentration for the wide concentration range shows the opera...

The possibility of using surface barrier discharge for the surface modification of polyester fabrics with the aim of making them more hydrophilic was studied. The action of surface-barrier discharge leads to the formation of hydrophilic oxygen-containing groups on the surface of polyester fabrics owing to weak degradation of poly(ethylene terephtha...

The electrochemical and antioxidant properties of 5,10,15,20-tetrakis(3′-hydroxyphenyl)porphyrin (H2T(m-OHPh)P) and 5,10,15,20-tetrakis(4′-hydroxyphenyl)porphyrin (H2T(p-OHPh)P) were tested by the cyclic voltammetry (CV) method. It is shown that in dimethylsulfoxide (DMSO) the electroreduction processes of oxygen and porphyrins are under diffusion...

Poly-5,10,15,20-tetrakis(4'-aminophenyl)porphyrin (poly-H2T(p-NH2Ph)P) films were obtained using dimethylsul-foxide solutions of porphyrin by electropolymerization during voltage scanning in the range of -2.0 to +1.2 V vs Pt quasi-reference electrode. Significant influence of dissolved oxygen on the film formation process was also demonstrated. It...

Antioxidant properties of tetraphenylporphyrin (H2TPhP), 5,10,15,20-tetrakis(4-hydroxy-3,5-di-tert-butylphenyl) porphyrin (H2T(4-OH-3,5-di-t-BuPh)P), 5,10,15,20-tetrakis(3-hydroxyphenyl)porphyrin (H2T(3-OHPh)P), 5,10,5,20-tetrakis(4-hydroxyphenyl)porphyrin (H2T(4-OHPh)P), 5,10,15,20-tetrakis(3-aminophenyl)porphyrin (H2T(3-NH2Ph)P) and 5,10,15,20-te...

The possibility of surface activation of polyethylene terephthalate materials due to their weak alkaline hydrolysis which does not cause weakening of the fibrous material has been shown. The activation has the positive effect on the functional products application on polyester material surface. It has been shown that during weak surface hydrolysis...

Free radicals and reactive oxygen species (ROS) are important intermediate products in physiological processes. In the healthy cell, they are generated and regulated by enzymes and low molecular weight antioxidants. Overproduction of ROS leads to a large list of diseases, so the determination of antioxidant activity of perspective natural and synth...

Export Date: 18 October 2014

Impedance spectroscopy was used to study properties of the Cu|H2O + i-C3H7OH + CuSO4 interface. It was shown that, at isopropanol concentrations of 0.04–0.06 mol fraction, the structural transformation in the near-electrode space decelerates the transport in the diffusion layer, which promotes synthesis of nanosize copper-containing powders. The qu...

In this paper the authors demonstrate the possibility of surface activation of polyethylene terephthalate materials due to their weak alkaline hydrolysis, does not cause weakening of the fibrous material. As a result of hydrolysis of the surface layer of fibrous material formed an additional amount of carboxyl and hydroxyl groups. Last exert a posi...

The electrode impedance spectroscopy technique was used to study the process of formation of a conducting polyporphyrin film on a Pt electrode from a 10–3 M solution of tetrakis(p-aminophenyl)porphin in dichloromethane. An equivalent circuit is suggested for simulation of interface impedance in a wide range of working electrode potentials. It is sh...

In this work the interaction of the superoxide ion radical with tetrakis(p-aminophenyl)porphyrin was studied by cyclic voltammetry (CV) at negative potential region vs saturated calomel electrode (SCE) to evaluate an antioxidant activity of porphyrin.

Effects of tetrakis(4’-deсaoxyphenyl)porphyrin on the electrochemical reduction of oxygen on Pt electrode in dimethylformamide were studied by method of cyclic voltamperometry with rotating disk electrode. The oxygen electrochemical reduction is identifed as a wide (from -0.75 to -1.5 V respect saturated calomel electrode) irreversible peak which d...

The present chapter includes the detailed study on the structural properties and biological activity of both polystyrene films and polystyrene films containing fullerene. The basic attention is given to kinetics of hierarchical nanostructures formation in surface layer of polystyrene-fullerene composite. The structural characteristics of polystyren...

The equations of motion for a charged particle in an electric field featuring a stationary and an oscillating component are considered for the case where the force of friction is linear in the particle velocity. The averaging of these equations over the period of field oscillations is legitimate under some specific conditions. The most general expr...

This work investigates the influence of the pulse repetition frequency on the profile generated within pulse electrochemical dimensional machining of nickel foil using a cylindrical electrode tool. Geometrical criteria for the shaping accuracy characteristics are introduced. It has been demonstrated that, irrespectively of the criterion calculation...

This chapter explores ways to improve the properties of polyester material in the processing of its surface temperature plasma at atmospheric pressure. The plasma discharge was generated in a sodium hydroxide solution. During the modification process a fiber was extend through the diaphragm which placed into electrolyte solution. Electric current w...

A new composite material, polypropylene threads fi lled with nanosized copper powder, was prepared. The material exhibits decreased electrical resistivity.

The process of electroreduction of copper from aqueous ethanol solutions of copper sulfate on a copper electrode is studied using the polarization and impedance techniques. It is shown that, at the working electrode potentials in a range of −0.6 to −0.8 V, the rate-limiting step of the process is the diffusion of copper ions to the electrode’s surf...

Plasma-chemical modification of polyester thread ensures formation of active hydroxyl and carboxyl groups on its surface, necessary for fixation of functional preparations whose application on the surface of fibre material gives it new properties — water-repellent, antimicrobial, deodorizing, etc. A comparison of the efficacy of plasma-chemical and...

Electrochemical shaping of nickel under pulsed polarization with various pulse shapes and repetition frequencies was studied. The effect of parameters of the pulsed dimensional electrochemical machining on the process of anodic dissolution of the metal was examined.

The structural characteristics of polystyrene films modified by the incorporation of fullerenes (C60 or buckyballs) were researched by X-ray diffraction technique. It is shown that structures with 2.3,2.5 and 3.9 Å interplanar distance are present in the fullerene-doped polystyrene films. The analysis of a small angle area of difractograms evidence...

The structural characteristics of polystyrene films modified by the incorporation of fullerenes (C60 or buckyballs) were researched by the X-ray diffraction technique. It is shown that structures with 2.3, 2.5 and 3.9 Å interplanar distance are present in the fullerene doped polystyrene films. The analysis of a small angle area of difractograms evi...

By the method of impedance spectroscopy the properties of the phase boundary of Cu|H 2 O + i-C 3 H 7 OH + CuSO 4 system were investigated. The impedance hodographs were obtained, in the form of circles with displaced centers. The capacity values of electrical double layer, exchange currents, and resistance of the electrolyte solution depending on t...

The system Cu/H 2 O–C 2 H 5 OH–CuSO 4 was studied in a wide range of organic component concentrations by the impedance spectroscopy method. In the studied range of ethanol concentrations the diffusion of ions to an electrode is the limiting stage of the electrode process. An increase in the ethanol concentration results in a decrease in the double...

Ultradispersed copper-bearing powders have been produced by the method of electrochemical cathode reduction from water-isopropanol solutions of copper dichloride. The dimensional and morphological properties of the obtained compounds have been studied using the procedure of atomic-power microscopy. It is shown that the introduction of isopropyl alc...

It was shown by electron microscopy and X-ray diffraction that a polystyrene solid with a three-level hierarchical structure was formed when the solvent was evaporated from a solution of polystyrene in o-xylene (polystyrene molecules stuck together united to form a framework). The kinetics of the transformation of formerly dissolved molecules into...

Possibility of obtaining nanodispersed copper-containing powders by electrochemical cathodic deposition from aqueous and water–isopropanol solutions of copper dichloride was examined.

In this work, we estimated the aik and ωik values for primary aggregates of polymer molecules in solutions of polystyrene in o-xylene containing small amounts of fullerenes С60 and С70. Aggregates formed in a solution layer applied to an inert substrate upon evaporation of the solvent at ambient temperature and conversion of the solution into a pol...

A carbon electrode covered with lanthanum carbonate is proposed to synthesize metallofullerenes of the La@Cn row. Application of the electrode allows La@Cn production with the yield of ca. 0.5% of the C60 amount. No unfavorable changes in total yield of fullerenes, amount of cathode deposit and arc parameters are observed.

Formation of transparent crystallites embedded in the deposited substrate obtained in a reactor for arc synthesis of fullerenes was studied. An X-ray diffraction analysis of the substrate was made.

Clusters of boron nitride BxNx (x = 1–4, 12, 15, 30) were investigated by the Hartree-Fock and density functional methods using the 6-31G* basis. It was found that linear, cyclic, and shell structures are stable against minor deformations of the BxNx cluster. Inclusion of electron correlation in calculation markedly changes the electron density dis...

A method for synthesis of metallofullerenes by electric-arc sputtering of graphite, in which lanthanum compounds are deposited on the surface of a graphite electrode, was suggested. The influence exerted by the amount of deposited lanthanum on the yield of lanthanum was studied.

Plasma-liquid technologies at atmospheric pressure provide a wide range of possibilities for applications. One of them, the treatment of archaeological artifacts, is presented in this paper. The effects of discharges between a metal electrode and a solution surface and/or an interaction of hollow cathode plasma jet, plasma pencil, with liquid on th...

The plasma–solution interaction processes for gliding and point arcs between the aqueous solution surface and the metal electrode in the gas phase are studied. The plasma, liquid, and surface zones are taken into consideration. The electric field strength is measured, and the gas and electron temperatures and ion composition are estimated for the p...